218616081206 has 4 divisors (see below), whose sum is σ = 327924121812. Its totient is φ = 109308040602.

The previous prime is 218616081197. The next prime is 218616081239. The reversal of 218616081206 is 602180616812.

218616081206 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54654020300 + ... + 54654020303.

It is an arithmetic number, because the mean of its divisors is an integer number (81981030453).

Almost surely, 2^218616081206 is an apocalyptic number.

218616081206 is a deficient number, since it is larger than the sum of its proper divisors (109308040606).

218616081206 is a wasteful number, since it uses less digits than its factorization.

218616081206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109308040605.

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 218616081206 in words is "two hundred eighteen billion, six hundred sixteen million, eighty-one thousand, two hundred six".